diff --git a/.agents/plugins/marketplace.json b/.agents/plugins/marketplace.json
index eedc4e946..e87f716ef 100644
--- a/.agents/plugins/marketplace.json
+++ b/.agents/plugins/marketplace.json
@@ -28,18 +28,6 @@
       },
       "category": "Productivity"
     },
-    {
-      "name": "ralph",
-      "source": {
-        "source": "local",
-        "path": "./plugins/ralph"
-      },
-      "policy": {
-        "installation": "AVAILABLE",
-        "authentication": "ON_INSTALL"
-      },
-      "category": "Productivity"
-    },
     {
       "name": "datadog",
       "source": {
diff --git a/.claude-plugin/marketplace.json b/.claude-plugin/marketplace.json
index 8e146219a..2e59d6e75 100644
--- a/.claude-plugin/marketplace.json
+++ b/.claude-plugin/marketplace.json
@@ -37,20 +37,6 @@
       ],
       "version": "17.27.3"
     },
-    {
-      "name": "ralph",
-      "description": "PRD-driven persistence loop — keeps Claude working until all user stories pass",
-      "source": "./plugins/ralph",
-      "category": "development",
-      "tags": [
-        "ralph",
-        "loop",
-        "persistence",
-        "prd",
-        "automation"
-      ],
-      "version": "17.27.3"
-    },
     {
       "name": "datadog",
       "description": "Datadog observability skills for Claude Code via the pup CLI",
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index f03170d84..0a3319f3f 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -5,9 +5,9 @@ repos:
       - id: check-yaml
       - id: check-json
       - id: end-of-file-fixer
-        exclude: ^(tests/|\.ralph/)
+        exclude: ^tests/
       - id: trailing-whitespace
-        exclude: ^(tests/|\.ralph/)
+        exclude: ^tests/
 
   - repo: local
     hooks:
diff --git a/README.md b/README.md
index 6928d3fe1..a09a39969 100644
--- a/README.md
+++ b/README.md
@@ -47,9 +47,6 @@ bstack/
 │   ├── me/                    # Core personal workflow plugin
 │   │   ├── hooks/             # Session hooks (git guard, handoff, LSP checks)
 │   │   └── skills/            # Personal skills
-│   ├── ralph/                 # Ralph Loop plugin
-│   │   ├── hooks/             # Ralph persistence hooks
-│   │   └── skills/            # ralph, ralph-cancel
 │   ├── jira/                  # Jira integration plugin
 │   │   └── skills/            # Jira workflow skills
 │   ├── core/                  # Shared agent definitions
@@ -86,13 +83,6 @@ bstack/
 |-------|-------------|
 | `autoresearch` | git 추적 실험으로 metric을 반복 최적화하는 자율 실험 루프 |
 
-#### `ralph` plugin
-
-| Skill | Description |
-|-------|-------------|
-| `ralph` | PRD 기반 자동 반복 개발 루프 실행 |
-| `ralph-cancel` | 실행 중인 Ralph 루프 취소 |
-
 #### `jira` plugin
 
 | Skill | Description |
diff --git a/plugins/me/skills/setup/settings.json b/plugins/me/skills/setup/settings.json
index 9cef897ca..97c27b707 100644
--- a/plugins/me/skills/setup/settings.json
+++ b/plugins/me/skills/setup/settings.json
@@ -46,7 +46,6 @@
     "bstack@bstack": true,
     "core@bstack": true,
     "jira@bstack": true,
-    "ralph@bstack": true,
     "ks-amplitude@search-claude-code-plugins": true,
     "ks-databricks@search-claude-code-plugins": true,
     "ks-git-guard@search-claude-code-plugins": true,
diff --git a/plugins/ralph/.claude-plugin/plugin.json b/plugins/ralph/.claude-plugin/plugin.json
deleted file mode 100644
index 5d1a47185..000000000
--- a/plugins/ralph/.claude-plugin/plugin.json
+++ /dev/null
@@ -1,17 +0,0 @@
-{
-  "name": "ralph",
-  "version": "17.27.3",
-  "description": "PRD-driven persistence loop — keeps Claude working until all user stories pass",
-  "author": {
-    "name": "baleen37",
-    "email": "git@baleen.me"
-  },
-  "license": "MIT",
-  "keywords": [
-    "ralph",
-    "loop",
-    "persistence",
-    "prd",
-    "automation"
-  ]
-}
diff --git a/plugins/ralph/.codex-plugin/plugin.json b/plugins/ralph/.codex-plugin/plugin.json
deleted file mode 100644
index fee3c3517..000000000
--- a/plugins/ralph/.codex-plugin/plugin.json
+++ /dev/null
@@ -1,18 +0,0 @@
-{
-  "name": "ralph",
-  "version": "17.27.3",
-  "description": "PRD-driven persistence loop — keeps Claude working until all user stories pass",
-  "author": {
-    "name": "baleen37",
-    "email": "git@baleen.me"
-  },
-  "license": "MIT",
-  "keywords": [
-    "ralph",
-    "loop",
-    "persistence",
-    "prd",
-    "automation"
-  ],
-  "skills": "./skills/"
-}
diff --git a/plugins/ralph/hooks/hooks.json b/plugins/ralph/hooks/hooks.json
deleted file mode 100644
index 037bf7994..000000000
--- a/plugins/ralph/hooks/hooks.json
+++ /dev/null
@@ -1,16 +0,0 @@
-{
-  "hooks": {
-    "Stop": [
-      {
-        "matcher": "*",
-        "hooks": [
-          {
-            "type": "command",
-            "command": "bun run \"${PLUGIN_ROOT:-$CLAUDE_PLUGIN_ROOT}/hooks/ralph-persist.ts\"",
-            "timeout": 10
-          }
-        ]
-      }
-    ]
-  }
-}
diff --git a/plugins/ralph/hooks/ralph-persist.ts b/plugins/ralph/hooks/ralph-persist.ts
deleted file mode 100644
index 8cf006b60..000000000
--- a/plugins/ralph/hooks/ralph-persist.ts
+++ /dev/null
@@ -1,58 +0,0 @@
-#!/usr/bin/env bun
-import { existsSync, readFileSync, writeFileSync, unlinkSync, mkdirSync } from "fs";
-import { join } from "path";
-
-const STALE_MS = 7_200_000; // 2h
-
-function allow(): never { process.exit(0); }
-function block(i: number, m: number, p: string, cwd: string): never {
-  let progress = "";
-  try {
-    const prd = JSON.parse(readFileSync(join(cwd, ".ralph", "prd.json"), "utf8"));
-    const stories = prd.userStories || [];
-    const done = stories.filter((s: any) => s.passes).length;
-    progress = ` (${done}/${stories.length} stories done)`;
-  } catch {}
-  let lastFail = "";
-  try {
-    const lines = readFileSync(join(cwd, ".ralph", "progress.txt"), "utf8").trim().split("\n");
-    lastFail = ` Last: ${lines[lines.length - 1]}`;
-  } catch {}
-  process.stdout.write(JSON.stringify({ decision: "block", reason: `[RALPH ${i}/${m}]${progress}${lastFail} Continue: ${p}` }));
-  process.exit(0);
-}
-
-async function main() {
-  const input = JSON.parse(await Bun.stdin.text() || "{}");
-  const cwd = input.cwd ?? process.cwd();
-  const sid = input.session_id ?? "";
-  const dir = join(cwd, ".ralph", "state");
-  const sp = join(dir, "ralph-state.json");
-  const save = (s: any) => writeFileSync(sp, JSON.stringify(s, null, 2));
-  const off = (s: any) => { s.active = false; save(s); allow(); };
-
-  const sentinel = join(dir, "ralph-activating");
-  if (existsSync(sentinel) && !existsSync(sp)) {
-    const p = readFileSync(sentinel, "utf8").trim();
-    unlinkSync(sentinel);
-    const now = new Date().toISOString();
-    mkdirSync(dir, { recursive: true });
-    save({ active: true, session_id: sid, iteration: 1, max_iterations: 10, started_at: now, last_checked_at: now, prompt: p });
-    block(1, 10, p, cwd);
-  }
-
-  let s: any;
-  try { s = JSON.parse(readFileSync(sp, "utf8")); } catch { allow(); }
-  if (!s?.active) allow();
-  if (s.session_id && sid && s.session_id !== sid) allow();
-  if (existsSync(join(dir, "cancel-signal-state.json"))) { unlinkSync(join(dir, "cancel-signal-state.json")); off(s); }
-  if (Date.now() - new Date(s.last_checked_at).getTime() > STALE_MS) off(s);
-
-  if (s.iteration >= s.max_iterations) s.max_iterations += 10;
-  s.iteration += 1;
-  s.last_checked_at = new Date().toISOString();
-  save(s);
-  block(s.iteration, s.max_iterations, s.prompt, cwd);
-}
-
-main().catch((e) => { process.stderr.write(`ralph-persist: ${e}\n`); process.exit(0); });
diff --git a/plugins/ralph/skills/ralph-cancel/SKILL.md b/plugins/ralph/skills/ralph-cancel/SKILL.md
deleted file mode 100644
index 867fa8ca2..000000000
--- a/plugins/ralph/skills/ralph-cancel/SKILL.md
+++ /dev/null
@@ -1,14 +0,0 @@
----
-name: ralph-cancel
-description: Cancel an active Ralph loop — cleans up state files and exits the persistence loop
----
-
-# Ralph Cancel
-
-Cancel the Ralph loop in the current project (CWD).
-
-1. If `.ralph/state/ralph-state.json` missing → "No active Ralph loop found."
-2. If `active: false` → "Ralph loop is already inactive."
-3. Write `.ralph/state/cancel-signal-state.json` (`{}`) — the Stop hook detects this and exits
-4. Set `active: false` in `.ralph/state/ralph-state.json`
-5. Report: "Ralph loop cancelled."
diff --git a/plugins/ralph/skills/ralph/SKILL.md b/plugins/ralph/skills/ralph/SKILL.md
deleted file mode 100644
index 9bfa6a535..000000000
--- a/plugins/ralph/skills/ralph/SKILL.md
+++ /dev/null
@@ -1,29 +0,0 @@
----
-name: ralph
-description: PRD-driven persistence loop — keeps Claude working until all user stories pass
----
-
-# Ralph Loop
-
-Stop hook keeps you running until you write the cancel signal.
-
-## Activation
-1. `mkdir -p .ralph/state/`
-2. Write `.ralph/state/ralph-activating` with the task description
-
-## PRD (`--no-prd` → auto-generate single-story prd)
-Create `.ralph/prd.json`: `project`, `userStories[]` with `id`, `title`, `acceptanceCriteria[]`, `priority`, `passes:false`. Keep stories small and dependency-ordered.
-
-## Loop
-1. Read `.ralph/progress.txt` if it exists
-2. Find highest-priority `passes:false` story
-3. All stories pass → go to Done
-4. Implement one story at a time, run tests
-5. Pass → set `passes:true`. Fail → append `[ITER N] US-XXX: <reason>` to `.ralph/progress.txt`
-
-## Done
-1. Review code quality (`--critic=none` to skip)
-2. Remove slop: unnecessary comments, dead code, over-abstractions (`--no-deslop` to skip)
-3. Run full test suite — must pass
-4. Write `.ralph/state/cancel-signal-state.json` (`{}`)
-5. Reply `<promise>COMPLETE</promise>`
diff --git a/tests/codex_marketplace_json.bats b/tests/codex_marketplace_json.bats
index 75d968330..ae7c3923f 100644
--- a/tests/codex_marketplace_json.bats
+++ b/tests/codex_marketplace_json.bats
@@ -36,7 +36,7 @@ setup() {
 @test "codex marketplace plugin entries use relative local paths and default policy" {
     local plugin_count
     plugin_count=$(jq -r '.plugins | length' "$MARKETPLACE_JSON")
-    [ "$plugin_count" -eq 5 ]
+    [ "$plugin_count" -eq 4 ]
 
     jq -e '
       .plugins
diff --git a/tests/ralph_hooks_json.bats b/tests/ralph_hooks_json.bats
deleted file mode 100644
index 8fcd11862..000000000
--- a/tests/ralph_hooks_json.bats
+++ /dev/null
@@ -1,37 +0,0 @@
-#!/usr/bin/env bats
-# Test: ralph plugin hooks.json validation
-
-load helpers/bats_helper
-
-HOOKS_JSON="${PROJECT_ROOT}/plugins/ralph/hooks/hooks.json"
-
-setup() {
-    ensure_jq
-}
-
-@test "ralph hooks.json is valid JSON" {
-    [ -f "$HOOKS_JSON" ] || skip "hooks.json not found"
-    validate_json "$HOOKS_JSON"
-}
-
-@test "ralph hooks.json has Stop hook" {
-    [ -f "$HOOKS_JSON" ] || skip "hooks.json not found"
-    local has_stop
-    has_stop=$($JQ_BIN -e '.hooks.Stop' "$HOOKS_JSON")
-    [ -n "$has_stop" ]
-}
-
-@test "ralph hooks.json only has Codex-supported top-level fields" {
-    [ -f "$HOOKS_JSON" ] || skip "hooks.json not found"
-
-    local unsupported_fields
-    unsupported_fields=$($JQ_BIN -r 'keys - ["hooks"] | .[]' "$HOOKS_JSON")
-    [ -z "$unsupported_fields" ]
-}
-
-@test "ralph hooks.json Stop hook uses plugin-root fallback" {
-    [ -f "$HOOKS_JSON" ] || skip "hooks.json not found"
-    local command
-    command=$($JQ_BIN -r '.hooks.Stop[0].hooks[0].command' "$HOOKS_JSON")
-    [[ "$command" == *'${PLUGIN_ROOT:-$CLAUDE_PLUGIN_ROOT}'* ]]
-}
diff --git a/tests/ralph_persist.bats b/tests/ralph_persist.bats
deleted file mode 100644
index 6ea666132..000000000
--- a/tests/ralph_persist.bats
+++ /dev/null
@@ -1,153 +0,0 @@
-#!/usr/bin/env bats
-# Test: ralph-persist.ts Stop hook engine
-
-load helpers/bats_helper
-
-HOOK_SCRIPT="${PROJECT_ROOT}/plugins/ralph/hooks/ralph-persist.ts"
-RALPH_DIR=""
-
-setup() {
-    RALPH_DIR="$(mktemp -d)/project"
-    mkdir -p "${RALPH_DIR}/.ralph/state"
-}
-
-teardown() {
-    rm -rf "$(dirname "$RALPH_DIR")"
-}
-
-# Helper: invoke the hook with given session_id and cwd
-invoke_hook() {
-    local session_id="${1:-test-session}"
-    local cwd="${2:-$RALPH_DIR}"
-    echo "{\"session_id\": \"$session_id\", \"cwd\": \"$cwd\", \"hook_event_name\": \"Stop\"}" \
-        | bun run "$HOOK_SCRIPT"
-}
-
-# Helper: write state file
-write_state() {
-    local state="$1"
-    echo "$state" > "${RALPH_DIR}/.ralph/state/ralph-state.json"
-}
-
-@test "no state file: writes nothing and exits 0" {
-    run invoke_hook
-    [ "$status" -eq 0 ]
-    [ -z "$output" ]
-}
-
-@test "active false: writes nothing and exits 0" {
-    write_state '{"active":false,"session_id":"test-session","iteration":1,"max_iterations":100,"last_checked_at":"2099-01-01T00:00:00.000Z"}'
-    run invoke_hook
-    [ "$status" -eq 0 ]
-    [ -z "$output" ]
-}
-
-@test "session_id mismatch: writes nothing and exits 0" {
-    write_state '{"active":true,"session_id":"session-A","iteration":1,"max_iterations":100,"last_checked_at":"2099-01-01T00:00:00.000Z"}'
-    run invoke_hook "session-B"
-    [ "$status" -eq 0 ]
-    [ -z "$output" ]
-}
-
-@test "cancel signal exists: writes nothing, deletes signal, sets active false" {
-    write_state '{"active":true,"session_id":"test-session","iteration":1,"max_iterations":100,"last_checked_at":"2099-01-01T00:00:00.000Z"}'
-    touch "${RALPH_DIR}/.ralph/state/cancel-signal-state.json"
-
-    run invoke_hook
-    [ "$status" -eq 0 ]
-    [ -z "$output" ]
-    [ ! -f "${RALPH_DIR}/.ralph/state/cancel-signal-state.json" ]
-    local active
-    active=$($JQ_BIN -r '.active' "${RALPH_DIR}/.ralph/state/ralph-state.json")
-    [ "$active" = "false" ]
-}
-
-@test "stale state (>2h): writes nothing, sets active false" {
-    local stale_time
-    stale_time=$(date -u -v-3H '+%Y-%m-%dT%H:%M:%S.000Z' 2>/dev/null || date -u -d '3 hours ago' '+%Y-%m-%dT%H:%M:%S.000Z')
-    write_state "{\"active\":true,\"session_id\":\"test-session\",\"iteration\":1,\"max_iterations\":100,\"last_checked_at\":\"$stale_time\"}"
-
-    run invoke_hook
-    [ "$status" -eq 0 ]
-    [ -z "$output" ]
-    local active
-    active=$($JQ_BIN -r '.active' "${RALPH_DIR}/.ralph/state/ralph-state.json")
-    [ "$active" = "false" ]
-}
-
-@test "active state with matching session: returns decision block and increments iteration" {
-    write_state '{"active":true,"session_id":"test-session","iteration":2,"max_iterations":100,"last_checked_at":"2099-01-01T00:00:00.000Z","prompt":"build todo API"}'
-
-    run invoke_hook "test-session"
-    [ "$status" -eq 0 ]
-    local decision
-    decision=$($JQ_BIN -r '.decision' <<< "$output")
-    [ "$decision" = "block" ]
-    local iteration
-    iteration=$($JQ_BIN -r '.iteration' "${RALPH_DIR}/.ralph/state/ralph-state.json")
-    [ "$iteration" = "3" ]
-}
-
-@test "max_iterations reached: extends by 10 and blocks" {
-    write_state '{"active":true,"session_id":"test-session","iteration":100,"max_iterations":100,"last_checked_at":"2099-01-01T00:00:00.000Z","prompt":"build todo API"}'
-
-    run invoke_hook "test-session"
-    [ "$status" -eq 0 ]
-    local decision
-    decision=$($JQ_BIN -r '.decision' <<< "$output")
-    [ "$decision" = "block" ]
-    local max_iter
-    max_iter=$($JQ_BIN -r '.max_iterations' "${RALPH_DIR}/.ralph/state/ralph-state.json")
-    [ "$max_iter" = "110" ]
-}
-
-@test "happy path: full loop lifecycle" {
-    # Setup: active state
-    write_state '{"active":true,"session_id":"test-session","iteration":1,"max_iterations":100,"last_checked_at":"2099-01-01T00:00:00.000Z","prompt":"build todo API"}'
-
-    # iteration 1 → block, becomes 2
-    run invoke_hook "test-session"
-    [ "$status" -eq 0 ]
-    local decision
-    decision=$($JQ_BIN -r '.decision' <<< "$output")
-    [ "$decision" = "block" ]
-
-    # iteration 2 → block, becomes 3
-    run invoke_hook "test-session"
-    [ "$status" -eq 0 ]
-    decision=$($JQ_BIN -r '.decision' <<< "$output")
-    [ "$decision" = "block" ]
-
-    # Create cancel signal
-    touch "${RALPH_DIR}/.ralph/state/cancel-signal-state.json"
-
-    # Next stop → allow, cancel signal deleted, active false
-    run invoke_hook "test-session"
-    [ "$status" -eq 0 ]
-    [ -z "$output" ]
-    [ ! -f "${RALPH_DIR}/.ralph/state/cancel-signal-state.json" ]
-    local active
-    active=$($JQ_BIN -r '.active' "${RALPH_DIR}/.ralph/state/ralph-state.json")
-    [ "$active" = "false" ]
-}
-
-@test "session isolation: orphaned state is ignored" {
-    write_state '{"active":true,"session_id":"session-A","iteration":1,"max_iterations":100,"last_checked_at":"2099-01-01T00:00:00.000Z","prompt":"build todo API"}'
-
-    run invoke_hook "session-B"
-    [ "$status" -eq 0 ]
-    [ -z "$output" ]
-}
-
-@test "activation sentinel: creates state and blocks on first stop" {
-    mkdir -p "${RALPH_DIR}/.ralph/state"
-    echo "build todo API" > "${RALPH_DIR}/.ralph/state/ralph-activating"
-
-    run invoke_hook "test-session"
-    [ "$status" -eq 0 ]
-    local decision
-    decision=$($JQ_BIN -r '.decision' <<< "$output")
-    [ "$decision" = "block" ]
-    [ -f "${RALPH_DIR}/.ralph/state/ralph-state.json" ]
-    [ ! -f "${RALPH_DIR}/.ralph/state/ralph-activating" ]
-}